JP3377356B2 - Corona discharge wire wiring machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for assembling a corona discharge device such as a charging, transferring and discharging charger in an electrophotographic image forming apparatus such as a copying machine, a facsimile machine, a printer, etc. For corona discharge wire wiring machine.

[0002]

2. Description of the Related Art In an image forming apparatus using an electrophotographic system in a facsimile machine, a printer, a copying machine, etc., a charging for uniformly charging the photoconductor as a pre-stage before forming an electrostatic latent image on the photoconductor. A corona discharge device such as a charger, a transfer charger for developing an electrostatic latent image into a visible image and transferring the image onto a transfer sheet, and a separation charger for separating the transfer sheet after transfer from the photoconductor. Is provided.

A corona discharge wire wiring machine used for assembling the corona discharge device has been disclosed in Japanese Patent Laid-Open No.
There is a technique described in Japanese Patent No. 53699. According to this publication, the wiring work of the corona discharge wire is automated to enable efficient wire wiring work.

[0004]

However, Japanese Patent Laid-Open No. 6-5
According to the technique described in Japanese Patent No. 3699, during wiring work
Since the tension applied to the corona discharge wire is not measured, it is difficult or impossible to recognize it as a defect even if the tension is out of the allowable range due to the variation. Therefore, in the conventional means for applying a tension to the corona discharge wire, it is not possible to judge whether the applied tension is within the allowable range, and if the applied tension is inappropriate, the tension is changed from that state. Since it cannot be determined whether the wire tension should be weakened or strengthened, there is a possibility that the wire tension may be welded and fixed while the wire tension is poor.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a corona discharge wire wiring machine capable of obtaining an appropriate wire tension while improving the wiring work efficiency of the corona discharge wire. And

[0006]

As a technical means for effectively solving the above problems, the present invention is to stretch a corona discharge wire between insulating end blocks provided at both ends of a conductive case. In a corona discharge wire wiring machine for mounting, a gripping means for gripping the corona discharge wire, a tension applying means for applying a predetermined tension to the corona discharge wire, and a measuring means for quantitatively measuring the applied tension. It is characterized by having. With this configuration, it is possible to detect the tension applied to the corona discharge wire,
The tension can be adjusted based on the measurement result.

Further, it is characterized in that display means is provided for displaying whether or not the tension measured by the measuring means is within a predetermined tension allowable range. With this configuration, the tension can be adjusted while confirming whether or not the tension is appropriate on the display means.

Further, the present invention is characterized by further comprising fixing means for fixing the corona discharge wire in a state where a predetermined tension is applied, at a predetermined position. With this configuration, the corona discharge wire can be fixed while the tension is maintained in an appropriate state.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing the constitution of an embodiment of a corona discharge wire wiring machine of the present invention, FIG. 2 is a side sectional view showing the internal structure of a corona discharge device, and 1 is a corona discharge wire, 2a, 2b are installed so as to face each other, a wire chuck 3 for stretching the discharge wire 1 is provided, 3 is a casing which is a conductive case, and 4 is provided between the wire chuck 2a and the wire chuck 2b so as to face each other. Casing pedestals 5 installed at the end of the casing 3 are end blocks fixed to both ends of the casing 3. The end blocks 5 and 5'are made of a resinous insulator, and wire fixing pins 5a and 5b for fixing the corona discharge wire 1 are provided upright on the end blocks 5 and 5 '. The wire fixing pins 5a and 5b are formed integrally with the end blocks 5 and 5 '. Also, the wire fixing pins 5a
A slit (not shown) is formed in 5b, and the corona discharge wire 1 is sandwiched by this slit (not shown) and stretched between the wire fixing pin 5a and the wire fixing pin 5b.

6 is a wire cleaning member which moves between the end blocks 5 and 5 ', 7 is a spool around which the corona discharge wire 1 is wound, and 8 is a tension applying means for applying a tension to the corona discharge wire 1. A micro head, 9 is a load cell that is a means for quantitatively measuring the tension, 10 is an indicator for displaying the measurement result by the load cell 9, 11a, 11b
Is a welding machine for fixing the corona discharge wire 1 to the wire fixing pins 5a, 5b by melting the wire fixing pins 5a, 5b, and 12 is a wire height positioning means for determining the height of the corona discharge wire 1.

FIG. 3 is a plan view showing a schematic structure of the load cell and its periphery. 13 is a rail, 14 is a substrate on which the wire chuck 2b is mounted, 15 is a substrate on which the load cell 9 is mounted, Board 14 and board 15 by guide
Moves parallel to the direction in which the corona discharge wire 1 is stretched. Further, the tension detecting portion 9a of the load cell 9 is connected to the substrate 14, and the micro head 8 is further connected to the substrate 15. Therefore, the substrate 15 slides in accordance with the movement of the micro head 8, and the substrate 14 slides in conjunction with it. Therefore, the wire chuck 2
While the corona discharge wire 1 is gripped by a and 2b, the micro head 8 is operated to move the wire chuck 2b and the load cell 9 away from the end block 5 ', so that the tension is applied to the corona discharge wire 1. At the same time, a load is applied to the tension detector 9a, and the tension is detected based on the load. And the result is the indicator
It is displayed at 10 (see FIG. 1).

Next, the wiring work of the corona discharge wire will be described with reference to FIGS.

FIG. 4 is a flow chart showing a work procedure when wiring the corona discharge wire by using the corona discharge wire wiring machine of FIG.
The casing 3 to which 5'is attached is set on the casing pedestals 4 and 4 (S1). Then, the corona discharge wire 1 wound on the spool 7 is pulled out slightly longer than the entire length of the casing 3 (S2), and the corona discharge wire 1 is clamped on the wire chuck 2a (S3). Next, the corona discharge wire 1 is passed through the slits of the wire fixing pins 5a and 5b of the end blocks 5 and 5 '(S4), and the end portion of the corona discharge wire 1 is clamped by the wire chuck 2b (S5).

After the above work is completed, the corona discharge wire 1
Welding. At this time, first, the wire fixing pin 5a on the spool 7 side and the corona discharge wire 1 are fixed by the welding machine 11a (S6). In this state, while checking the display device 10, the micro head 8 is moved back and forth to adjust the tension applied to the corona discharge wire 1 (S7), and the predetermined tension for clamping the wire cleaning member 6, for example, 100 ± 30 gf
(S8). Then, the wire height positioning means 12 is lowered to a predetermined position (S9), and the wire cleaning member 6 is further moved.
By moving the corona discharge wire 1 together with the slit (not shown) of the wire cleaning member 6 by moving the corona discharge wire 1 to the left and right, the height of the corona discharge wire 1 (see the symbol h in FIG. 2) is stabilized (S10). ), The desired height, for example 5.4
Adjust to ± 0.3 mm (S11). Corona discharge wire 1
After the positioning of the height is completed, the micro head 8 is operated to further feed the load, and the tension is applied to the corona discharge wire 1 (S12) to a predetermined tension. For example, the adjustment is performed while checking the indicator 10 so that it becomes 220 ± 20 gf (S13), and when a predetermined tension is displayed, the welding machine 11b welds the wire fixing pin 5b of the end block 5 '(S14). After welding
The corona discharge wire 1 is cut outside the end blocks 5 and 5 '(S15), and the casing 3 is removed from the wiring machine body (S16), whereby the corona discharge wire 1 wiring operation is completed.

[0016]

According to the present invention configured as described above, it becomes possible to monitor the tension applied to the corona discharge wire through the measuring means, and the tension is applied to the corona discharge wire with high accuracy. It is possible to obtain a stable quality corona discharge device.

Further, whether or not the tension applied to the corona discharge wire is satisfied with respect to a predetermined allowable range can be directly notified to the human eyes and ears by the tension display means so that the person can recognize the false judgment. Can be prevented.

Furthermore, by adding a means for fixing the corona discharge wire to the corona discharge device while maintaining a wired state with a predetermined tension applied, a stable wire tension can be obtained even after fixing the corona discharge wire. It can be obtained with high accuracy.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of an embodiment of a corona discharge wire wiring machine of the present invention.

FIG. 2 is a side sectional view showing an internal structure of a corona discharge device.

FIG. 3 is a plan view showing a schematic configuration of a load cell and its periphery.

FIG. 4 is a flowchart showing a work procedure when wiring a corona discharge wire.

[Explanation of symbols]

1 ... Corona discharge wire, 2a, 2b ... Wire chuck,
3 ... Casing, 4 ... Casing cradle, 5,
5 '... end block, 5a, 5b ... wire fixing pin,
6 ... Wire cleaning member, 7 ... Spool, 8 ... Micro head, 9 ... Load cell, 9a ... Tension detection unit, 1
0 ... Display, 11a, 11b ... Welding machine, 12 ... Wire height positioning means, 13 ... Rail, 14, 15 ... Board.

Continuation of the front page (56) Reference JP-A-6-289690 (JP, A) JP-A-6-53699 (JP, A) JP-A-48-92027 (JP, A) Jitsukaihei 5-94855 (JP , U) Actual Kaihei 1-172061 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G03G 15/02 G03G 15/14 G03G 15/16 102 H01T 19/00 H05K 13 / 06

Claims (3)

(57) [Claims] 1. A corona discharge wire wiring machine for stretching a corona discharge wire between insulating end blocks provided at both ends of a conductive case, wherein a gripping means for gripping the corona discharge wire, and A corona discharge wire wiring machine comprising: a tension applying means for applying a predetermined tension to a corona discharge wire; and a measuring means for quantitatively measuring the applied tension. 2. The corona discharge wire wiring machine according to claim 1, further comprising display means for displaying whether or not the tension measured by the measuring means is within a predetermined tension allowable range. 3. The corona discharge wire wiring machine according to claim 1, further comprising fixing means for fixing the corona discharge wire in a predetermined tension state at a predetermined position.